Energy Conversions

Use this easy and mobile-friendly calculator to convert between various units of Energy.
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1 Nutritional Calorie =
4.184 Kilojoules
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Calories
A nutritional Calorie, or kilocalorie, is commonly used in food labeling. It is equal to 4.184 kilojoules. The average American consumes about 2,700 kilocalories per day.
Kilojoules
A kilojoule is 1,000 joules. In some countries, food is labeled in kilojoules, much like kilocalories are used in the United States.

Browse Energy Conversions

Convert from BTUs
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Convert from Kilowatt Hours

Energy Conversion Tables

some results are rounded
1 BTU
1.0551 x 1010 ergs
0.25216 calories
8.7719 x 10-6 gallons of gas
1,055.1 joules
1.0551 kilojoules
0.00029307 kilowatt hours
1 Calorie
3.9657 btus
4.184 x 1010 ergs
0.000034787 gallons of gas
4,184 joules
4.184 kilojoules
0.0011622 kilowatt hours
1 Erg
9.4782 x 10-11 btus
2.3901 x 10-11 calories
8.3142 x 10-16 gallons of gas
1 x 10-7 joules
1 x 10-10 kilojoules
2.7778 x 10-14 kilowatt hours
1 Gallon of Gas
114,000 btus
1.2028 x 1015 ergs
28,747 calories
120,276,384 joules
120,280 kilojoules
33.410 kilowatt hours
1 Joule
0.00094782 btus
10,000,000 ergs
0.00023901 calories
8.3142 x 10-9 gallons of gas
0.001 kilojoules
2.7778 x 10-7 kilowatt hours
1 Kilojoule
0.94782 btus
1 x 1010 ergs
0.23901 calories
8.3142 x 10-6 gallons of gas
1,000 joules
0.00027778 kilowatt hours
1 Kilowatt Hour
3,412.1 btus
3.6 x 1013 ergs
860.42 calories
0.029931 gallons of gas
3,600,000 joules
3,600 kilojoules
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